Frankfurt Motor Show 2015: First look at Peugeot Fractal car

Among the flashy machines on display at the Frankfurt motor show this week, the real show-stealers are the concept-cars.

They are what you get when engineers are allowed to do pretty much what they want.

The BBC's Theo Leggett talked to Carlos Tavares, CEO of PSA Peugeot Citroen, about the Fractal.